the heart

• What type of blood does the right vena cava carry?

  Deoxygenated blood
• Where does deoxygenated blood enter the heart?

  Right atrium
• What is the function of pacemaker cells in the heart?

  They regulate the heartbeat
• What does the pulmonary artery do?

  Takes deoxygenated blood to the lungs
• What is the function of the aorta?

  Takes oxygenated blood to the body
• What is the role of valves in the heart?

  Prevent backflow of blood
• What is the left atrium's function?

  Receives oxygenated blood from lungs
• What does the left ventricle do?

  Pumps oxygenated blood to the body
• What are the main components of the heart's structure and their functions?

  • Right atrium: Receives deoxygenated blood
  • Right ventricle: Pumps blood to lungs
  • Left atrium: Receives oxygenated blood
  • Left ventricle: Pumps blood to body
  • Valves: Prevent backflow of blood
  • Pacemaker cells: Regulate heartbeat
• What are the definitions of key heart terms?

  • Ventricle: Pushes blood out of heart
  • Atrium: Contracts to push blood into ventricle
  • Aorta: Takes blood to body
  • Vena cava: Carries deoxygenated blood to right atrium
  • Pulmonary artery: Carries blood to lungs
  • Pulmonary vein: Carries oxygenated blood from lungs to heart
  • Atrioventricular valve: Stops blood flow back into atrium
• What type of muscle is the heart made of?

  Cardiac muscle
• What is the purpose of the septum in the heart?

  Separates the left and right sides
• How does the right side of the heart differ from the left side?

  Right side pumps to lungs; left pumps to body